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Morphology and electronic structure of nanoscale powders of calcium hydroxyapatite.

Kurgan N, Karbivskyy V, Kasyanenko V - Nanoscale Res Lett (2015)

Bottom Line: Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined.It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone.The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

View Article: PubMed Central - PubMed

Affiliation: G.V. Kurdymov Institute for Metal Physics of the NAS of Ukraine, blvd. Vernadsky, 36, Kiev, 03680 Ukraine.

ABSTRACT
Atomic force microscopy, infrared spectroscopy and NMR studied morphological and physicochemical properties of calcium hydroxyapatite powders produced by changing the temperature parameters of synthesis. Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined. It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone. The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

No MeSH data available.


Related in: MedlinePlus

The presence of organic impurities in the samples according to IR spectroscopy. Annealing temperature samples: 1 - 200°C; 2 - 500°C; 3 - 900°C; 4 - 1,000°C. Transmission spectra were recorded in the absorption range in the 4,000 to 400 cm−1.
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Fig4: The presence of organic impurities in the samples according to IR spectroscopy. Annealing temperature samples: 1 - 200°C; 2 - 500°C; 3 - 900°C; 4 - 1,000°C. Transmission spectra were recorded in the absorption range in the 4,000 to 400 cm−1.

Mentions: It should be noted that the presence of impurity atoms and other defects significantly affects vibrational infrared spectra. In the investigated samples are the presence of CO2 from the atmosphere and a small amount of residual organic reaction (Figure 4). Thermal annealing of HAP leads to changes in the hydroxyl sublattice: the number of OH− ion decreases with increasing annealing temperature, as evidenced by the decrease in the intensity of the bands at approximately 3,400 and 2,900 cm−1, which correspond to vibration stretching of O-H and C-H bonds (Figure 4).Figure 4


Morphology and electronic structure of nanoscale powders of calcium hydroxyapatite.

Kurgan N, Karbivskyy V, Kasyanenko V - Nanoscale Res Lett (2015)

The presence of organic impurities in the samples according to IR spectroscopy. Annealing temperature samples: 1 - 200°C; 2 - 500°C; 3 - 900°C; 4 - 1,000°C. Transmission spectra were recorded in the absorption range in the 4,000 to 400 cm−1.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385053&req=5

Fig4: The presence of organic impurities in the samples according to IR spectroscopy. Annealing temperature samples: 1 - 200°C; 2 - 500°C; 3 - 900°C; 4 - 1,000°C. Transmission spectra were recorded in the absorption range in the 4,000 to 400 cm−1.
Mentions: It should be noted that the presence of impurity atoms and other defects significantly affects vibrational infrared spectra. In the investigated samples are the presence of CO2 from the atmosphere and a small amount of residual organic reaction (Figure 4). Thermal annealing of HAP leads to changes in the hydroxyl sublattice: the number of OH− ion decreases with increasing annealing temperature, as evidenced by the decrease in the intensity of the bands at approximately 3,400 and 2,900 cm−1, which correspond to vibration stretching of O-H and C-H bonds (Figure 4).Figure 4

Bottom Line: Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined.It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone.The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

View Article: PubMed Central - PubMed

Affiliation: G.V. Kurdymov Institute for Metal Physics of the NAS of Ukraine, blvd. Vernadsky, 36, Kiev, 03680 Ukraine.

ABSTRACT
Atomic force microscopy, infrared spectroscopy and NMR studied morphological and physicochemical properties of calcium hydroxyapatite powders produced by changing the temperature parameters of synthesis. Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined. It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone. The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

No MeSH data available.


Related in: MedlinePlus